ECJ: Thermal window in VW diesel engine inadmissible

According to a ruling by the European Court of Justice (ECJ), so-called thermal windows in diesel vehicles are impermissible if the exhaust gas purification system is only fully functional within a narrow temperature range. If emissions are only fully cleaned between 15 and 33 degrees Celsius, but not outside this range, it is an impermissible defeat device, the ECJ ruled on Thursday. Such a lack of conformity is also not minor, the court declared. Consequently, a rescission of the purchase contract is not fundamentally excluded.

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